CN217501854U - Hydraulic device with purely manual power-off self-closing speed regulation system - Google Patents
Hydraulic device with purely manual power-off self-closing speed regulation system Download PDFInfo
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- CN217501854U CN217501854U CN202220747310.XU CN202220747310U CN217501854U CN 217501854 U CN217501854 U CN 217501854U CN 202220747310 U CN202220747310 U CN 202220747310U CN 217501854 U CN217501854 U CN 217501854U
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- 230000008713 feedback mechanism Effects 0.000 claims abstract description 33
- 230000005611 electricity Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 78
- 230000001105 regulatory effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 241001672018 Cercomela melanura Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to a hydraulic device with a purely manual power-off self-closing speed regulation system, which comprises a self-centering motor, a hydraulic feedback mechanism, a manual/automatic switching valve, a proportional servo valve, a main pressure distributing valve and double oil filters; an operating handle is arranged at the upper end of the self-centering motor; the shell of the hydraulic feedback mechanism is provided with a hydraulic feedback mechanism oil port A, an oil port T and an oil port P; the manual/automatic switching valve is a two-position three-way valve and is provided with an electric-hydraulic control position a and an electric-losing spring position b; the manual/automatic switching valve is provided with an oil port A, an oil port B and an oil port P of the manual/automatic switching valve; the proportional servo valve comprises a proportional servo valve oil port A, a proportional servo valve oil port T, a proportional servo valve oil port P and a proportional servo valve power-off position c; the main distributing valve comprises a main distributing valve oil port A, a main distributing valve oil port B, a main distributing valve oil port T and a main distributing valve oil port P. The utility model discloses can realize the pure mechanical hydraulic pressure manual operation function and the power failure self-closing stator function after the power plant loses the electricity.
Description
Technical Field
The utility model belongs to the technical field of hydroelectric power generation, especially, relate to a possess pure manual mistake electricity self-closing speed control system hydraulic means.
Background
At present, large and medium-sized hydroelectric generating sets in China basically adopt a microcomputer speed regulator as main control equipment of the set, and an electro-hydraulic conversion component of a speed regulating system mostly adopts a proportional servo valve or a motor type electro-hydraulic converter. The proportional servo valve has the advantage of high adjustment precision but has higher requirement on the quality of operating oil, and if the quality of the operating oil is not high, blockage is easy to form, and oil stains are easy to appear due to larger oil consumption; the motor type converter is low in oil demand, oil leakage is not prone to occurring in daily operation, and maintenance amount is low. In order to improve the safety and reliability of the speed regulating system, more and more hydraulic power plant speed regulating systems adopt redundant configuration of an electro-hydraulic servo valve and a motor type electro-hydraulic converter in an electro-hydraulic conversion part.
For the hydroelectric generating set which needs to bear the task of 'black start', the speed regulating system cannot automatically control the hydroelectric generating set to open or close the guide vane under the special condition of power failure of the whole hydroelectric power plant, and the emergency disposal of the hydroelectric generating set is influenced. The hydraulic control system of the speed regulating system with the purely mechanical hydraulic manual operation function can control the starting of the hydroelectric generating set, and the basic capability that the speed regulator can reliably operate and stably run in the black starting process of the generating set can be ensured under the condition that a service power supply disappears; in addition, with the development of intelligent power plant technology, more and more water power plants are going to be managed in an unattended and unattended mode, so that higher requirements are provided for the reliability of the water power plants, for example, under sudden extreme conditions, if the alternating current and direct current power supplies of the power plants disappear simultaneously, in order to prevent serious safety accidents, a speed regulating system or other protection devices can safely and reliably shut down the units, technicians are waited to check and confirm safety and then grid-connected power generation is carried out, and twenty-five key requirements for preventing power production accidents (national energy agency safety No. [2014] 161) 23.1.8 have a clear requirement for stipulating that the large and medium-sized water power plants adopt 'power-off action' rules, and when the protection and control loop voltage of the water turbine generator sets disappears, the related protection and control devices can automatically act to shut down the water guide mechanisms of the units. Therefore, there is a need to develop a hydraulic device with a mechanical hydraulic manual control and power-off self-closing speed regulating system to ensure that the hydroelectric generating set meets the requirements of related 'black start' tasks and daily safe operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a possess pure manual mistake electricity self-closing speed control system hydraulic means, realize the pure mechanical hydraulic pressure manually operation function and the mistake electricity self-closing stator function after the power plant loses the electricity.
The invention provides a hydraulic device with a purely manual power-off self-closing speed regulating system, which comprises a self-centering motor, a hydraulic feedback mechanism, a manual/automatic switching valve, a proportional servo valve, a main pressure distributing valve and double oil filters, wherein the hydraulic feedback mechanism is connected with the self-centering motor through a hydraulic oil pipe;
an operating handle is arranged at the upper end of the self-centering motor and is used for enabling a valve core of the hydraulic feedback mechanism to move upwards or downwards by operating the operating handle to rotate forwards or reversely;
a hydraulic feedback mechanism oil port A, a hydraulic feedback mechanism oil port T and a hydraulic feedback mechanism oil port P are arranged on the shell of the hydraulic feedback mechanism;
the manual/automatic switching valve is a two-position three-way valve and is provided with an electric-hydraulic control position a and an electric-power-off spring position b; the manual/automatic switching valve is provided with a manual/automatic switching valve oil port A, a manual/automatic switching valve oil port B and a manual/automatic switching valve oil port P; the oil port A of the manual/automatic switching valve is connected with the oil port A of the hydraulic feedback mechanism; the oil port P of the manual/automatic switching valve receives the electrical feedback of a main position of the main distributing valve;
the proportional servo valve comprises a proportional servo valve oil port A, a proportional servo valve oil port T, a proportional servo valve oil port P and a proportional servo valve power-off position c; the oil port A of the proportional servo valve is connected with the oil port B of the manual/automatic switching valve; the oil port T of the proportional servo valve is connected with the oil port T of the hydraulic feedback mechanism; the oil port P of the proportional servo valve is connected with the oil port P of the hydraulic feedback mechanism;
the main pressure distribution valve comprises a main pressure distribution valve oil port A, a main pressure distribution valve oil port B, a main pressure distribution valve oil port T and a main pressure distribution valve oil port P; the oil port A of the main distributing valve is connected with the servomotor open cavity; the oil port B of the main distributing valve is connected with the servomotor closed cavity; the main distributing valve oil port T is connected with the hydraulic feedback mechanism oil port T, the proportional servo valve oil port T and the oil return tank; the main pressure distributing valve port P is connected with the double oil filters;
the double oil filters are connected with the hydraulic feedback mechanism oil port P and the proportional servo valve oil port P.
By means of the scheme, the hydraulic device of the purely manual power-off self-closing speed regulating system has the following technical effects:
1) the device has the function of automatically closing the guide vanes when power is lost, a special power-loss shutdown scram valve and a scram linkage valve are not required to be configured, the condition that the electromagnetic valve is electrified for a long time does not exist, and the reliability is high.
2) The device has the advantages of high-precision adjusting performance of the proportional servo valve and less oil for the motor, is maintenance-free, can realize purely mechanical hydraulic manual operation, and greatly improves the emergency handling capacity of the speed regulator.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made of preferred embodiments of the present invention.
Drawings
Fig. 1 is a schematic structural diagram of the hydraulic device of the purely manual power-off self-closing speed regulation system of the utility model.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a hydraulic device with a purely manual power-off self-closing speed regulation system, which includes a self-centering motor 1, a hydraulic feedback mechanism 2, a manual/automatic switching valve 3, a proportional servo valve 4, a main pressure distributing valve 5, and a dual oil filter 6. An operating handle 11 is arranged at the upper end of the self-centering motor 1, and the valve core of the hydraulic feedback mechanism 2 can be moved upwards or downwards by operating the operating handle 11 to rotate in the forward direction or the reverse direction.
An oil port A, an oil port T and an oil port P are arranged on the shell of the hydraulic feedback mechanism 2; the manual/automatic switching valve 3 is a two-position three-way valve, wherein the position a is an electro-hydraulic control position, the position B is an electricity-losing spring position, and the valve is provided with an oil port A, an oil port B and an oil port P. When hand/automatic switch valve 3 is in a position (hand/automatic switch valve hydraulic fluid port A and hydraulic fluid port P intercommunication), the speed regulator accessible is from restoring to the well motor 1 control stator and open and close: if the motor rotates to enable the valve core of the hydraulic feedback mechanism 2 to move upwards, the oil port A of the hydraulic feedback mechanism is communicated with the oil port T, the oil cavity at the upper end of the main distributing valve 5 is communicated with oil to discharge oil, so that the valve core of the main distributing valve 5 moves upwards under the action of constant pressure oil in the lower cavity, the oil port B on the main distributing valve 5 is communicated with the oil port P, the oil port A is communicated with the oil port T, the servomotor closing cavity is connected with the pressure oil to open the cavity to discharge oil, and the guide vane is closed; on the contrary, if the self-centering motor 1 rotates to enable the valve core of the hydraulic feedback mechanism 2 to move downwards, the guide vane is opened;
when hand/automatic switch valve 3 is in b position (hand/automatic switch valve hydraulic fluid port b and hydraulic fluid port P intercommunication), the speed regulator accessible proportional servo valve 4 control stator is opened and is closed: if the speed regulator commands to enable the valve core of the proportional servo valve 4 to move rightwards, the oil port A of the proportional servo valve is communicated with the oil port P, the oil cavity at the upper end of the main distributing valve 5 is communicated with pressure oil to enable the valve core of the main distributing valve 5 to move downwards, the oil port B on the main distributing valve 5 is communicated with the oil port T, the oil port A is communicated with the oil port P, the servomotor closes the cavity to discharge oil, the servomotor opens the cavity to be communicated with the pressure oil, and the guide vane is opened; on the contrary, if the valve core of the proportional servo valve 4 moves leftwards, the guide vane is closed; at the moment, if the proportional servo valve 4 loses power, the proportional servo valve 4 is in the C position, an oil port A of the proportional servo valve 4 is communicated with an oil port T, an oil port P is cut off, an oil cavity at the upper end of the main pressure distribution valve 5 is communicated with oil for discharging, so that a valve core of the main pressure distribution valve 5 moves upwards under the action of constant pressure oil in a lower cavity, a guide vane is closed, and the power-losing shutdown is realized.
After the whole power plant loses power, the self-centering motor 1 and the proportional servo valve 4 cannot receive the control instruction of the electric part of the speed regulator to adjust the control guide vane. At the moment, the manual/automatic switching valve 3 and the proportional servo valve 4 are both in an off-potential state, the manual/automatic switching valve 3 can be manually operated by a screwdriver to be switched from a position b to a position a, so that an oil port A and an oil port P of the manual/automatic switching valve 3 are communicated, and at the moment, the motor can be positively rotated or reversely rotated by operating an operating handle 11 at the upper end of the self-centering motor 1 to enable a valve core of the hydraulic feedback mechanism 2 to move upwards or downwards, so that the guide vanes are closed or opened.
This possess pure manual mistake electricity self-closing speed control system hydraulic means has following technological effect:
1) the device has the function of automatically closing the guide vanes when power is lost, a special power-loss shutdown scram valve and a scram linkage valve are not required to be configured, the condition that the electromagnetic valve is electrified for a long time does not exist, and the reliability is high.
2) The device has the advantages of high-precision adjusting performance of the proportional servo valve and less oil for the motor, is maintenance-free, can realize purely mechanical hydraulic manual operation, and greatly improves the emergency handling capacity of the speed regulator.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A hydraulic device with a purely manual power-loss self-closing speed regulation system is characterized by comprising a self-centering motor (1), a hydraulic feedback mechanism (2), a manual/automatic switching valve (3), a proportional servo valve (4), a main pressure distributing valve (5) and a double oil filter (6);
the upper end of the self-centering motor (1) is provided with an operating handle (11) which is used for operating the operating handle (11) to rotate in the forward direction or in the reverse direction to enable a valve core of the hydraulic feedback mechanism (2) to move upwards or downwards;
a hydraulic feedback mechanism oil port A, a hydraulic feedback mechanism oil port T and a hydraulic feedback mechanism oil port P are arranged on the shell of the hydraulic feedback mechanism (2);
the manual/automatic switching valve (3) is a two-position three-way valve and is provided with an electric-hydraulic control position a and an electric-power-off spring position b; an oil port A of the manual/automatic switching valve, an oil port B of the manual/automatic switching valve and an oil port P of the manual/automatic switching valve are arranged on the manual/automatic switching valve (3); the oil port A of the manual/automatic switching valve is connected with the oil port A of the hydraulic feedback mechanism; the oil port P of the manual/automatic switching valve receives the main position electrical feedback of the main distributing valve (5);
the proportional servo valve (4) comprises a proportional servo valve oil port A, a proportional servo valve oil port T, a proportional servo valve oil port P and a proportional servo valve power-off position c; the oil port A of the proportional servo valve is connected with the oil port B of the manual/automatic switching valve; the oil port T of the proportional servo valve is connected with the oil port T of the hydraulic feedback mechanism; the oil port P of the proportional servo valve is connected with the oil port P of the hydraulic feedback mechanism;
the main pressure distribution valve (5) comprises a main pressure distribution valve oil port A, a main pressure distribution valve oil port B, a main pressure distribution valve oil port T and a main pressure distribution valve oil port P; the oil port A of the main distributing valve is connected with the servomotor open cavity; the oil port B of the main distributing valve is connected with the servomotor closed cavity; the main distributing valve oil port T is connected with the hydraulic feedback mechanism oil port T, the proportional servo valve oil port T and the oil return tank; the main pressure distributing valve port P is connected with the double oil filters (6);
the double oil filters (6) are connected with the hydraulic feedback mechanism oil port P and the proportional servo valve oil port P.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220747310.XU CN217501854U (en) | 2022-04-01 | 2022-04-01 | Hydraulic device with purely manual power-off self-closing speed regulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220747310.XU CN217501854U (en) | 2022-04-01 | 2022-04-01 | Hydraulic device with purely manual power-off self-closing speed regulation system |
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| Publication Number | Publication Date |
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| CN217501854U true CN217501854U (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220747310.XU Active CN217501854U (en) | 2022-04-01 | 2022-04-01 | Hydraulic device with purely manual power-off self-closing speed regulation system |
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| Country | Link |
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| CN (1) | CN217501854U (en) |
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2022
- 2022-04-01 CN CN202220747310.XU patent/CN217501854U/en active Active
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